Which Descent Countries Allow Dual Citizenship With the United States, Dated

All six of them. Ireland, Canada, Germany, Italy, Poland and the United Kingdom each allow a person to hold their citizenship alongside American citizenship, and none of them asks you to give up the US passport as a condition of a descent claim.

That is the answer, and the useful part of this post is the second half of it: one of those six rules changed on a date recent enough that a great deal of what is written about it is still wrong, and the American side has an obligation of its own that has nothing to do with any of them.

What countries allow dual citizenship with the US: the six that matter here

Two of those cells say “nothing to report as changed”, and that is a statement about this post rather than about the law: those countries have not made a change I can date for you, and inventing one would be worse than the blank.

Germany is the row that pages still get wrong

Until 27 June 2024, German law generally required a person naturalising as German to give up their previous citizenship, and treated a German who voluntarily acquired a foreign citizenship as having lost the German one. The modernisation of the Staatsangehörigkeitsgesetz that came into force on that date changed both. Multiple citizenship is now generally accepted, which is why a page written in 2022 and never revised will tell you that Germany does not permit dual citizenship, and will be flatly wrong about the only question you asked.

For a descent claimant the distinction that survives is worth stating precisely: you were never naturalising. Under section 4(1) of the Staatsangehörigkeitsgesetz a child of a German parent is German from birth, and the certificate of citizenship records that. The old renunciation requirement applied to people acquiring German citizenship, not to people establishing one they already had. The German missions in the United States publish the consular position at germany.info, and the Bundesverwaltungsamt publishes the certificate procedure in English.

What the United States asks of you

The American side of the question is settled and has been for a long time, and it comes down to two things.

You do not lose US citizenship by acquiring another one. Loss requires a potentially expatriating act performed voluntarily and with the intention of relinquishing US nationality, under section 349(a) of the Immigration and Nationality Act. Being recognised as an Italian, registered as an Irish citizen, or issued a Canadian certificate is not by itself such an act. The Department of State sets this out on its dual nationality page.

You enter and leave the United States on a US passport. That is a standing obligation on US citizens, and it does not change because you now hold a second one. The same page states it.

Two things the United States does not ask: it has no register of your other citizenships to notify, and it does not require permission before a claim. Whether some other obligation applies to you because of a second citizenship — a filing, a declaration, a residence question — is a matter for that country and for a professional in it, and not something this site answers.

The one consequence that is not a yes or a no

Poland’s rule is worth stating separately, because it is not a restriction on holding and it is not nothing.

Polish law permits you to hold other citizenships. It also provides that a Polish citizen may not rely on a foreign citizenship in dealings with Polish authorities: to a Polish office you are Polish, full stop. That has consequences at Polish consulates, in Polish administrative procedures, and in principle in Poland itself. It is why the Polish line covers the practical half of holding the confirmation, and not only how to get it.

What a country permitting it does not settle

Permission to hold two citizenships is the narrowest of the questions, and answering it leaves three others open — which is why “yes” is where a page selling you something stops and where a useful one starts.

Whether that country expects you to use its passport at its own border. Whether it conscripts, and at what age. Whether a child of yours born next year inherits the line automatically or only on a registration made in time. None of those is decided by the sentence “dual citizenship is allowed”, and each of them is a real obligation somewhere in this table.

Why the 190-country tables are the wrong page for you

Search for this question and you will mostly find lists of every country in the world, sorted into allowed and not allowed. Three problems with them, for a descent reader:

1. They are undated. Germany moved in June 2024. A table with no date beside a row cannot tell you whether it knows.
2. They answer a different question. Most of those lists are about whether a country lets someone naturalise while keeping another citizenship. Your question is whether a country recognises a citizenship you have held from birth, which is not the same rule and in several countries is not even the same statute.
3. They stop at the yes. The useful answer is not that Poland allows it; it is what Poland does with the fact afterwards.

The list you need is six rows long, and it is above.

What to do with the answer

Nothing, if reassurance about the American passport was the whole question. It is not at risk on the six routes this site covers.

If you are deciding which line to pursue first, the deciding factor is not permission but time: whether each country lets you hold a third sets out the four things that genuinely constrain someone holding several, and the clocks that run on the Italian cut-off and the German declaration window are the ones worth acting on before the ones that do not run at all.

And if you are further along than that — the certificate has arrived, or is about to — living with two is the post about the part that starts afterwards: whom to tell, what does not change, and whether the child born next year inherits the line you have established.